Yep. If the 80/20 rule is true(and I keep finding anecdotal evidence it is), then wouldn't the natural frustrations of the 20% doing the 80% simply be perceived as toxicity by the other 80% doing the remaining 20%?
Take a team of 10 people. If 8 people get together and decide to say the 2 top performers are "toxic"(by whatever metric that is defined), what chance do those 2 people have, even if they are doing 80% of the work?
I'm smart, I'm competent, I know what I'm doing, and, most importantly, I know how to get you to come along with me willingly.
If that fails, well, I know how to say something that only becomes devistating once I leave the room and I'm better friends with all your co-workers anyway. Come at me.
The people you saw fired lacked that final quality. They bought into the narrative that our field is a meritocracy and that's a downright lie. They poured all their effort into their skills and ego and left zero room for learning to navigate office politics. They deserved to be fired.